fix: 修复前端类型标注与GraphQL访问数据不同的问题

- 将类型标注中的id字段改为string

server/mappers/questionMapper.ts

@@ -13,7 +13,7 @@ export function toProductQuestionView(raw: Question): ProductQuestionView {
   const trans = raw.translations?.[0];
 
   return {
-    id: raw.id,
+    id: raw.id.toString(),
     title: trans?.title ?? '',
     content: trans?.content ?? '',
   };
@@ -40,23 +40,23 @@ export function toQuestionListView(raw: Question): QuestionListView {
 
       const product_type = isObject<ProductType>(item.product_type)
         ? ({
-            id: item.product_type.id,
+            id: item.product_type.id.toString(),
             name: item.product_type.translations?.[0]?.name ?? '',
           } satisfies QuestionListProductType)
         : ({
-            id: -1,
+            id: '',
             name: '',
           } satisfies QuestionListProductType);
 
       return {
-        id: item.id,
+        id: item.id.toString(),
         name: translations?.name ?? '',
         type: product_type,
       };
     });
 
   return {
-    id: raw.id,
+    id: raw.id.toString(),
     title: trans?.title ?? '',
     content: trans?.content ?? '',
     products: related_products,